Parity violating pion electroproduction off the nucleon
H. -W. Hammer, D. Drechsel
Abstract
Parity violating (PV) contributions due to interference between γ and Z0 exchange are calculated for pion electroproduction off the nucleon. A phenomenological model with effective Lagrangians is used to determine the resulting asymmetry for the energy region between threshold and Δ(1232) resonance. The Δ resonance is treated as a Rarita-Schwinger field with phenomenological N Δ transition currents. The background contributions are given by the usual Born terms using the pseudovector πN Lagrangian. Numerical results for the asymmetry are presented.
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